Reflecting and refracting device for stereoscopes



w. P. REAvvl-:sv

REFLECTING AND REFRACTING DEVICE FR STEREOSCOES V1' Sheets-Sheet' FiledSept. v26,

April 17, 1928.

. W. P. REAVES REFLECTING AND REFRACTING DEVICE FOR sTEREoscoPEs 3Sheets-Sheet 5 Filed Sept. 26, 1923 Patented Apr. 17,

. aan ser vvILIJIAiJIl 'r'. REAvEs, 'crennnnsisond"nourrir eAieoLINA-J'REFLECTINGANDlnnrnneriire nnvioii'ronsfinnnosoorns, i

Appiiann ined samenwer a6, 1923. iserii No. facesse.`

In my copending `application,,Serial No.y 659,983, liled Augustj29,1923, vis disclosed and Vclaimed al reliecting and retract-ing deviceVadaptedl to be used in binocular observ`ation of plates or objects inradiographic diz agnosis. Thepresent invention relates to thestudy'radiograpliic plates mounted on a ure-3. the dust .protect-ingdoors being illus-` sameclass of optical devices andl has for itsVobject tlie provision of improved means.

whereby the radiographic diagno-stician may more accurately thanheretofore observe-and stereoscope. The invention consists essentiallyin tlie adjustable attachment to tlie observation device ot' astereoscope, commonly known as a mirror boX or vframe, of a plu-`vralityoflensesso that the diagnostician may l combine thernfin variousWays and; is tliere by enabled to more distinctly andaccuratcly focust-lie radiographic plates so that they appear at 'tlie proper distance,and so.` that they are magnified asdesired.. f

ATvvo forms of the invention are disclosed by Way of example but itavillbe understood that lthe invention may bel embodied in' vari-` ous otherforms las may be found convenient orv desirable, Without departing fromits spirit or scope. In tlie drawings:

Figure 1 is a front elevation of one-forni of the reflecting andrefracting` device Figure 2 is a sectiono-n line 2--2otl Figure 1;

. Figure 3 0f Fis'- ure 3;

Figuren is a Figure 4is asection on line 4 4 top plan view ofthe form,of tlieiiivention shown in Figures 3 and 4; vFigure 6 is a perspectiveview ot the lenses employed and Figure 7 is a sectionA on line 7-7-7 ofFigs tratedinjclosed position.- j .l I j j Referring particularly. toFigures land 2 it will be seen that the boxl-likelraine F, Whicliissuitably supported upon an v upright member 10, includes two mirrors r11arranged atan angle of 90-,3 andtheir protecting glasses 12, 12, and 13,13,V respectively. VThe detailed construction ofthe frame is` dis,vclosed and Ydescribed in my prior application-and will not be setifortliat lengthherei in as it forms no part. of mv present inven'` tion. Thedust protectingdoors 14, 14 andV 15, 15 are disclosed and claimed ininycopending' application Seriall No. 605,213, tiled December 6, 1922 andthe mirrors and pro'- is a front elevation of a modiedl forni of: theinvention; v y y tectingl glasses, and the manner of .supportf ing thesame, ai'e'disclosed-in my copending applicationSerial llt-3.7622551,tiled March 3, j

v`SideV lenses. 'arej indicated atvlt', 16, theseV lenses beinglslidablysupported upon arms 17, 17, which maybe v`swung.;about. a -ver-v itically adjustable postv 18 to.' either operative positionas `shoivn infull lines i-n-.Fig'uresl and 2,'-01 into inoperative position asy shownin dotted lines in Figure 2,.'andoutof the observerls. line `oit sight.kThe fparticularj means for-supporting the lenses `16, and the` meansorsecurin'g their adjustment .simul-i Itaneously V,toward `and from the'mirrors as desired is fully described in mycopending applicationeral No.`659,983 abover re-I .7,2

tei-red to.

VExtendingthrough vertically aligned:apiei-- tures in the top andbottoni plates 20 and 21 vrespectively of tlieranie are .parallel rods22. These rods are slidablyvniounted in inembers 20, 21.v A To thelorwer'end olieacli is se-l cured a` pulley'23 and these pulleys arecon-` nected, `by, a'` cord or 'belt 24 `Which extends around eachpulleyzbut which ycord is crossed at its midpoint 25. Horizontal platemem? n i toV the rodsf22f are of tlierods by lmeans ofthefpulleys-tliese lensesvmay be swu'ngfrom operative position` shown inYfullv lines in Figure 2 to inoperative position', as indicated in'Adotted lines-in this ligure., l I i or, 'in' conjunction With vthelenses 16 in gse,-

Q curing-aproper focu'sof the` radiographs.

Vertical.adjustment oflenses 2'7fiand liori `zontal .adjustment oflenses 16 :givesfthe apparatus 'greatfiie'xibilityand permits the di-`agnosticianto4 examine With {care any. por-*1 i tion of the radiographs.

VIn the form ot the invention vdisclosed in i Figures 3 to 6 inclusiveit is optional Wit-li 7. the diagnostician to use tvvo or more-v sidelenses 40-4-40 or 41-41 in combination vwith j Y v a .plurality otlensesV in front of the frameYY1 F. I have shown in Figure 4, four sidelenses, two mounted oneacli side of tliejii( frame, and in sucliinstance means is pro-r vided for simultaneously sliding the lenses v951,` TheA lenses27 v"may be .usedv by themselves s of each pair towardor away from each other to obtain the proper focus.

In this form of the device I provide a nose piece-42 with a rearwardlyextending central blade or finy 43 which is slidably held in a trackwayformed partly in each of two vertically extending stationary framemembers 44. To the upper end of the slidable nose piece (see Fig. 6) isattached a lens support S by means of somesuitable form of universalcoupling U. The lenssupport S comprises av sleeve member 45 rigidlysecured to a. portion of the universal coupling and this sleevemember-slidably receives a telescoping rod R which comprises an outermember 4:6 and an inner member elfi. The sleeve has projecting laterallytheretii'oi'n,

pairs of lugs 48 having'adjacent faces in` parallel spaced relation. y'Fongues i9 kof lenses 50 are adapted to be frictionally held betweenythe pairs of lugs 48 the distance be'- tween. the centers of the lensesbeingthe iterpupilary distance of the observer. The lenses beingfrictionally held in position may ybe quickly removed and replaced byVother lenses of different focal lengths .in the operation of the device.

The endv of member 47 is likewise provided with pairs of lugs 5l havingits adjacent faces parallel and these lugs frictionally hold tongues 52oflenses 53, which lenses may be removed and replaced `by other lenses,`quickly and easily as in the case of lenses 50. By sliding the member 46through the'sleeve 45, and telescoping the vinner member l? within themember 46 the distance between the two sets of lenses may be adjusted asdesired and by' moving thenose piece vern tically the lens support andvthe system of lenses may be brought to the desired horizontal position.

l/Vhen it is not desired to use'the set of lenses just described, itmaybe placed' within a Vspecial lens receiving and protecting hoodsecured to, the top member of the frame I?. The nose piece 42 is movedto its uppermost' position andlenses 53 are moved rearwardly bytelescopinc; members 4G and el?, and thrustingmember 46 through ythesleeve ina i'cmrward direction until the lenses occupy the positions inVwhich they are shown in Figure 6. The front dustprotectingdoors G1are''jrovided with upwardly extending portions` 62' which serv-e toclose Vthe front of the lens containing compartment and to protecttlie'lenses'when the device is not in use. i

The Ause of aV system of lenses or like refractory instruments with thevmirrors enables. the observer to make a more accurate observation anddiagnosis than when such lenses are not employed, and the use of aplurality of lense enables a number of combinations to be made, givingthe instrument great flexibility. Owing tothe manner in `which thelenses are secured they may be easily detached and other lenses ofdifferent focal lengths substituted so that notwithstanding any defectsin the sight of the diagnostieian himself, the radiograph may soon bebrought into perfect focus, and at any desired enlargement. If desired,a system of six or eight lenses may be used infront of the mirrors, andthis system may be used with side lenseslor without side lenses. Manycombinations or arrangements of lenses may beused and the .invention isnot limited in this respect.

Having thus described the invei'ition what is claimed as new and desiredto'be secured by Letters Patent is:

l. In an apparatus of the class described,

in combinatioin a frame, mirrors i'n'ount'ed" on the frame and' arrangedat an angle to each other, two lenses for each mirror, the axes of thelenses of each set intersecting at an angle of 90 and the lenses beingadjustable into or out of operative position.

In an apparatus of thev class described.' in combination, frame,mirrors? n'iounted on the frame and arranged at an angle to each other,Atwo lenses supported on the frame, one lens to cooperate with 'eachmirror, said lenses being in the same plane when iny operative positionbut being adapted to swing to inoperative position.

3. An apparatus of the class described", in combination, a frame,mirrors mounted on the frame and'v arranged at an angle `to each other,and a plurality of lenses `adapt-ed to be brought into cooperativerelationship to said mirrors, said lenses being adjustable verticallyinto and out of operative position. f

nection between said lens support and' saidf frame. for the purpose setforth. Y In testimony whereof I hereunto affini my signatu re. y

WILLIAM P'. REAVES.

4t. Inan apparatus of the class described,

